DCI-Based TCI State Updates for Low-Latency Control Channels
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing methods for configuring TCI state information of a control channel through RRC or RRC and MAC CE often result in large delays.
Innovation Solution
Configuring TCI state information of a control channel through downlink control information (DCI), including both common and dedicated DCI, to dynamically indicate and update TCI state information for CORESETs and PUCCH resources, with valid times determined based on predefined sequences and feedback signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If TCI state information is configured through RRC or RRC and MAC CE, then the configuration is reliable and complete, but the delay is large
Solution Approach 1:
The patent applies dynamics by enabling dynamic indication of TCI state information through DCI format 1_1 and 1_2, allowing the TCI state to be updated in real-time based on current channel conditions rather than being statically configured through RRC. This dynamic approach reduces configuration delay while maintaining reliability through flexible adaptation to changing wireless environments.
Solution Approach 2:
The patent changes the parameter configuration approach by introducing a new DCI field that directly indicates TCI state information, transitioning from multi-step RRC/MAC CE configuration to single-step DCI-based configuration. This parameter change reduces the number of signaling steps and associated delays while maintaining the完整性 of TCI state configuration.
2Adaptability or versatility
If multiple TCI states are configured through RRC, then adaptability is improved, but MAC CE is required for selection which increases complexity
Solution Approach 1:
The patent applies universality by designing a DCI field that can indicate multiple TCI states through a unified encoding scheme. The DCI format 1_1 and 1_2 incorporate a TCI field that can represent multiple TCI state combinations, eliminating the need for separate MAC CE selection procedures and reducing overall configuration complexity while maintaining adaptability.
Solution Approach 2:
The patent extracts the TCI state selection function from the MAC CE layer and moves it to the DCI layer. By incorporating TCI state indication directly into the DCI message, the patent removes the intermediate selection step that required MAC CE, thereby reducing configuration complexity while preserving the ability to select from multiple TCI states for different transmission scenarios.
3Loss of time
If TCI state information is configured through DCI, then delay is reduced, but the configuration capacity is limited
Solution Approach 1:
The patent applies dimensionality change by expanding the TCI field in DCI format 1_1 and 1_2 to accommodate multiple TCI states. Instead of indicating a single TCI state, the enhanced DCI structure can indicate multiple TCI states through bit field extensions and combinatorial encoding, thereby increasing configuration capacity within the DCI framework and eliminating the need for additional MAC CE messages.
Data Source
AI summary
The disclosure discloses a method for downlink control information (DCI) design, an electronic device, and a storage medium. The method for design includes: configuring transmission configuration indicator (TCI) state information of a control channel through a DCI.